doc: Document `pie' markups.

* doc/user/pie.skb (Syntax): Document markups.

* src/guile/skribilo/package/pie.scm (pie, slice, sliceweight): Add
  `:class' option.
  (pie, slice, sliceweight)[writers]: Add `:options'.

2 files changed, 11 insertions, 4 deletions

diff --git a/src/guile/skribilo/package/pie.scm b/src/guile/skribilo/package/pie.scm
index f99c725..2834076 100644
--- a/src/guile/skribilo/package/pie.scm
+++ b/src/guile/skribilo/package/pie.scm
@@ -44,7 +44,7 @@
 ;;;
 
 (define-markup (pie :rest opts
-		    :key (ident #f) (title "Pie Chart")
+		    :key (ident #f) (class "pie") (title "Pie Chart")
 		    (initial-angle 0) (total #f) (radius 3)
 		    (fingers? #t) (labels 'outside)
 		    (class "pie"))
@@ -56,7 +56,8 @@
 	(body (the-body opts))))
 
 (define-markup (slice :rest opts
-		      :key (ident #f) (weight 1) (color "white") (detach? #f))
+		      :key (ident #f) (class "pie-slice")
+                           (weight 1) (color "white") (detach? #f))
    (new container
 	(markup 'slice)
 	(ident (or ident (symbol->string (gensym "slice"))))
@@ -68,7 +69,8 @@
 	(body (the-body opts))))
 
 (define-markup (sliceweight :rest opts
-			    :key (ident #f) (percentage? #f))
+			    :key (ident #f) (class "pie-sliceweight")
+                                 (percentage? #f))
    (new markup
 	(markup 'sliceweight)
 	(ident (or ident (symbol->string (gensym "sliceweight"))))
@@ -251,6 +253,7 @@ the string \"hello\".  Implement `sliceweight' markups too."
 		   `("colors: " ,@colors "\n")))))
 
 (markup-writer 'pie (find-engine 'base)
+  :options '(:title :initial-angle :total :radius :labels)
   :action (lambda (node engine)
 	    (let* ((fmt (select-output-format engine))
 		   (pie-file (string-append (markup-ident node) "."
@@ -291,11 +294,13 @@ the string \"hello\".  Implement `sliceweight' markups too."
 			engine))))
 
 (markup-writer 'slice (find-engine 'base)
+  :options '(:weight :color :detach?)
   :action (lambda (node engine)
 	    ;; Nothing to do here
 	    (error "slice: this writer should never be invoked")))
 
 (markup-writer 'sliceweight (find-engine 'base)
+  :options '(:percentage?)
   :action (lambda (node engine)
 	    ;; Nothing to do here.
 	    (error "sliceweight: this writer should never be invoked")))
diff --git a/src/guile/skribilo/package/pie/lout.scm b/src/guile/skribilo/package/pie/lout.scm
index fe3c674..085cfc2 100644
--- a/src/guile/skribilo/package/pie/lout.scm
+++ b/src/guile/skribilo/package/pie/lout.scm
@@ -1,6 +1,6 @@
 ;;; lout.scm  --  Lout implementation of the `pie' package.
 ;;;
-;;; Copyright 2005, 2006, 2007  Ludovic Courtès <ludovic.courtes@laas.fr>
+;;; Copyright 2005, 2006, 2007, 2009  Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;;
 ;;; This program is free software; you can redistribute it and/or modify
@@ -49,6 +49,7 @@
 ;;;
 
 (markup-writer 'pie (find-engine 'lout)
+   :options '(:title :initial-angle :total :radius :labels :fingers?)
    :before (lambda (node engine)
 	      (let* ((weights (map (lambda (slice)
 				     (markup-option slice :weight))
@@ -121,6 +122,7 @@
 (markup-writer 'sliceweight (find-engine 'base)
    ;; This writer should work for every engine, provided the `pie' markup has
    ;; a proper `&total-weight' option.
+   :options '(:percentage?)
    :action (lambda (node engine)
 	      (let ((pct? (markup-option node :percentage?)))
 		 (output (number->string